Filling stop motion for looms



Dec. 10, 1929. T J. w. SIMPSON ,7

FILLING STOP MOTION FOR LOOMS Fild Aug. 6, 1928 H liar/13y:

Patented Dec. 10, 1929 UNITED STATES PATENT OFFICE JESSE W. SIMPSON, OIE ANDERSON, SOUTH CAROLINA, ASSIGNOR T CROMPTON & KNOWLES LOOM WORKS, OF. WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS FILLING- .STOIE MOTION FOR LOOMS Application filed August 6, 1928. Serial No. 297,856.

This invention relates to a filling stop motion for looms and it is the general object of the invention to provide a mechanism-of this type'with at least one fork effective to tension the filling so that the latter will oooperate properly with the remaining forks which operate in a manner usual in filling stop motions.

' For one reason or another it will occasion ally happen that the thread which extends from the selvage to a boxed shuttle will be' slack to such an extent that insufficient motion will be given the filling fork to move the fabric the length of filling extending from the selvage over to a box may be of suchlength as not properly to cooperate with the usual form of filling fork. Also, in automatic weft replenishing looms the shuttle is not completely threaded on the first pick aftertransfer and where the tension of the filling is increased upon a complete threading of the shuttle it is found that the filling is slackon said first pick after transfer. 7

It is an important object of my present invention to provide a filling stop. motion preferably of the side type which shall have a plurality of tines movable forwardly with the ing tines in such relation that the detecting filling fork slide and preferably movable about the same axis, at least one of the tines being positioned to extend below the race plate and behind the reed so as to tension the filling in whatever position it may assume by moving a portion of the same behind the grid which cooperates with the remaining tines.

to tip the latter out of stopping position.

It is a more specific'object ofiny present invention to locate the tensioning and detecttines which operate to stop the loom will be located between the tensioning tine and'the adjacent-selvage,the purpose of this relation being to secure more uniform tension on that part of the filling which engages the detecting tines. I do not wish to be limited to this relation but I have found it to be desirable.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein a convenient embodiment of my invention is set forth, p r

Fig. 1 is a top plan view of a portion of a loom having my invention applied thereto showing the lay in extreme forward position and the shuttle in such a position as it might assume after rebounding,

Fig. 2 is a vertical section on'line 22 of Fig. 1 on an enlarged scale showing the tensioning tine extending behind the reed line and indicating the detecting tines as being in non-stopping position,

"Fig. 3 is a horizontal section on line 33 of Fig. 2, and

Fig. 4: is a detailed vertical section on line l4 of Fig. 2.

Referringoto the drawings, I have shown a loom frame 10 on which is mounted the base 11 of the side stop motion. Upstanding from lever 15 as shownin Fig. 1. Said lever is pivoted as at 16 to the shipper handle stand 17' of the loom frame and has an arm 18 extending to the right of the pivot 16 and lying in front of the shipper handle 19.

' The lay 20is driven by appropriate mechanism to move back and forth in the loom to approach and recede from the plate 11. Thelay is provided with a reed 5210f the usual kind and also a box back 22. The latter positions the shuttle Sand the forward :surface 23 of the box back is in substantial alignment with the front edge of the reed 21 as shown more particularly in Fig. 3. A grid- 24 having a plurality of spaced wires 25 is secured to the lay and has the upright portions of the wires set preferably slightly behind the reed line. The upper end of said wires may be upwardly and rearwardly inclined as at 26 if desired and be connected together as suggested in Fig. 1.

Anwactuatoi head30 having a forwardly extending hook end 31 moves in a slot 32 formed in the slide 13. Said actuator head is moved forwardlyiby. mechanismnot shown bottom ofa well. 33 which extends across but well .unerstood every: second pick of the the laybelow. the .surf-aceR alongwhich the shuttle S moves. When the-weft W' is broken, however, mechanism-to be described "be stop V :lower'end-of whichialso.extendsiinto thewell clearly in' Fig; 2 :tine 50" extends behind the "ofthe slide 13' with a pivot pin 40 extending hereinafter operativelyconnects the head 30 'andsli'd'e 13 to move thela'tter'forwardlyand cause rocking of the lever 15 to'unseat the shipper handle 19, whereupon the loom will ped.

The matter thus-far described is of 'common construction in so-called side filling-stop moti ons-and forms noparjt of my present invention.

Iii-carrying my invention into effect 1' provide an improved means; for establishing connection between the hook 31 and theslid'e 13 said means including detecting and tension tines. Accordingly, I'provide the-rearend across the slot 32 and on which arepivotally mounted a'detectin'g element 41and a tensioning element 42 located to the'ri'ght of-the' detecting element as viewed in Fig. -1.

The detecting element includes a holding "member 43 -havin'g a forwardly extending loop 44 which is'adapted forcooperation with the hook 31 when weft is absent. The head 43 also'has depending therefrom in thisinstance a pair of detectingtines 45 which pass between corresponding wires:25 of the grid.

The bottoms of sa-idltines 45. extend into the well '33 to a position below the surfacexR along which the' shuttlefizmoves.

The tensioning eleinenti42 as shown herein comprises a single dependingtiner-fit) the 33 and below the surface R Asiishown" may" have a forwardly" extending arm 51 which by means'of a tensienspr-ing-Eflattached to an adjustable hook -53:carried by the slide 13 acts jtohold the te'nsioning tine.-

asubstan tially vertical lp'osition' such as shown m Fag-Q. his =shown 'in "Fig. 1-the arm 51 may extend across a portion of the slide 13 and be positioned by the latter under tension of the spring 52 The adjustable hook 53 may be formed substantially as shown in Fig, 1 and held in adjustable position forboth angular and longitudinal adjustment relatively to the slide 13 by screw 54. Inopenation, the weight of the hook engaging. loop 44" will .hold. the detecting tines 45 in a substantially vertical direction and -.the:sp.ring- 5.2..will act to hold the tensioning tine 50 also substantially vertical, but located behind the detectingtines and positioned to enter the space between two of the grid wires 25.. As the 'lay. moves forwardly with the weft, present andwith the shuttle. on that 'sideyof' the: loom adjacent the filling stop is present on detecting beats ofthe loom. As the laycontinues to move forwardly the tine will Vmove the weft W behind the reed l line tojt-he position shown in Fig. 3, thus remoVi-ng any; slackness in the weft and mov- =-ingth "latter tog-a position across the grid *where it'mayproperly cooperate with the detectinggtinesto tilt the latter.

"When the I lay I reaches itsextreme forward position the head 30 will 'move forwardly [but without effect unless the detecting tines have been unmoved due to weft absence, in whi'ch ca'sethe shipper'handle 19" will be unseated, as previously described.

The relation 'between the detecting and ten- -'s-ioninggtines issset forth clearly in. Fig. 3, jwhere'it will'be seen that the'weft Wis moved -rearwardly as at W" by the tensioningtine' on'each detecting beatof the loom.

"The deteeting tines 45'xwill'be moved to the position s'hown'inFig. 2 when weft is present so thatthe loop 44 will be elevated out of the p'ath ofthe hook 31 and thelatter will moveqforwar'dly without stopping the loom. 'Should -weft'be absent, however, the tensioning member will have nofunction to perform and th'e spring 52 will therefore remain at 'restrelativelytothe slide 13. but will movefor ward'lywiththe latter whenweft is absent. Should-the shuttle/be" nearer the center of theloomfthan it should be .due toJrebonnd- .ing, slackness wil'l exist in the/weft W, but this will ordinarily :be less than'the amount that ean-betaken up by the tensioning tine as 'gthe' latter moves to the position shown in Fig. '3; The springf52=will yieldishould the weft -Wbe'insuifieient to permitithe tensioning tine 50'to remain vertical for the complete forward stroke of "the-lay.

From the foregoing'it will be seen that I have provided a simple and effective :means for tensionin'g: and also detecting for the presence of weft, on detecting beats of the 100111.

It will further be seen that the detecting and tensioning elements are mounted on the same pivot pin and can yield forwardly under pressure of the weft as the lay advances. It will also be noted that the tensioning member extends below the level of the lay along which the shuttle moves. Furthermore, the detecting element ll may be located between the tensioning element 42 and the selvage V of the cloth, a condition which insures uniformity of tension in that portion of the weft which comes in contact with the detecting tines.

Having thus described my invention it will be seen that changes and modifications may be made. therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limfixed my signature.

ited to the details herein disclosed, but what I claim is:

In a filling detecting and tensioning stop motion for a loom, a lay having a surface along which the filling extends, a grid on the lay, a slidably mounted member, means carried thereby defining a pivotal support, a tensioning tine pivotally mounted on the support and positioned to extend behind the grid and below the surface along which the filling extends when the lay is in its forward position, said tensioning tine having a forwardly extending normally horizontal arm, a substantially horizontal tension spring connected to the arm and having the forward end thereof secured to the member to hold said tensioning tine relatively fixed with respect to the member when said tensioning tine engages filling extending across the grid, said tension spring causing the tensioning tine to take up slack in the weft, and a detecting element pivotally mounted on the support to be tilted by filling extending across the grid.

In testimony whereof I have hereunto af- J'ESSE W. SIMPSON. 

